Most of my users upgraded to 1809 in the last week or two and now they are having issues with network resources. The symptom is an active directory user (Scanner) can no longer access their shared folder (\\machinename\Scans), even though that user has full read/write permissions. When I sit at the client computer and bring up properties for the folder, Security correctly shows the users with correct permissions. If I try to add a user to the list however, under Locations I am only shown the local computer, not the AD. My guess is when the Scanner user attempts to connect to write a file the client machine looks for them in the local user store instead of the AD store and fails when it can't find them. Am I looking in the right direction, or am I totally off base?
I ran into the issue presenting in a different way as well today. when I'm logged into the computer and do a software install, registry edits fail. This is because you need Admin rights to write to the registry and the user credentials are domain credentials. I now have a dozen or so machines with the issue, all upgraded to 1809.